 Hi everybody and welcome to Tatum's Tech Talk. Thanks ever so much for your feedback from our first episode, our first show about gearing. It appears to have gone down really nicely. This time around I'm going to move on to carburation, another area that can actually be adjusted at the track and crucial part of a Speedway bikes setup. The carburetor is bespoke, it sits on top of the engine here because the Speedway bikes engine is actually laid over. I brought one along with me so we can just take a closer look at it. There are strict regulations specifically to the size of the hole that goes through there. I'll just pull the slide up and that has to be 34. That was introduced some time ago to actually slow the bikes down, they were 38 previously. But the area that I really want to focus on here is at the bottom of the bowl where the main jet is. There's a whole range of sizes of main jets, small right through to quite large. I've got one here, I think yes there it is. If we can just focus on it, it's quite small but all the fuel is metered through that hole. Now the size of the jet is very important because if it's cold the engine will want more fuel. You introduce a larger jet if it's hot like it's been recently then the air quality is poor. You don't need as much fuel, you need to get that ratio balance between air and fuel spot on. You'll need a slightly smaller jet to keep that engine nice and crisp and running as it should do. Ryder's hack actually at times will tell you that this decision whether you need to go larger or smaller can be really very problematic and at times you'll see some real soul searching going on in the pits to make the right cool. Very easy to go down the wrong road here. Carburetion, the condition of the carburetor also needs to be in good fetal because there's lots of vibration here and things can actually get worn quite quickly but an expensive bit of kit getting the right jet which is not so expensive with the right size, absolutely vital to make sure that your engine is running at this absolute optimum and as I say an area that can manipulate the speedway bike setup during the event. Carburetion, vital.